Google Apps Script邮件CC与多收件人功能失效求助

我搜索相关内容后未找到解决方案，尝试为发送邮件添加CC功能，多次尝试均失败，不清楚问题所在。以下是我的代码及尝试过程：

初始代码 #

var TO_ADDRESS = "email1@gmail.com";// email to send the form data to

核心发送邮件代码 #

MailApp.sendEmail({
  to: TO_ADDRESS,
  subject: "TEXT",
  replyTo: String(mailData.email),
  htmlBody: formatMailBody(mailData)
});

已尝试的无效方案 #

• 方案1：新增TO_CC变量

var TO_ADDRESS = "email1@gmail.com";// email to send the form data to
var TO_CC = "email2@gmail.com";// cc email to send the form data to
...
MailApp.sendEmail({
  to: TO_ADDRESS,
  cc: TO_CC,
  subject: "TEXT",
  replyTo: String(mailData.email),
  htmlBody: formatMailBody(mailData)
});

• 方案2：在to参数中添加多个邮箱

var TO_ADDRESS = "email1@gmail.com,email2@gmail.com";// email to send the form data to
...
MailApp.sendEmail({
  to: TO_ADDRESS,
  subject: "TEXT",
  replyTo: String(mailData.email),
  htmlBody: formatMailBody(mailData)
});

• 方案3：硬编码邮箱地址

MailApp.sendEmail({
  to: email1,
  cc: email2,
  subject: "TEXT",
  replyTo: String(mailData.email),
  htmlBody: formatMailBody(mailData)
});

参考官方文档说明 #

我查阅了Google Apps Script官方文档，其中关于sendEmail方法的参数定义如下：

• to：字符串类型，收件人邮箱地址，支持逗号分隔的多个地址
• cc：字符串类型，抄送邮箱地址，支持逗号分隔的多个地址

希望有人能指出问题所在，感谢！

内容的提问来源于stack exchange，提问作者BoB3R